chore: use gh api for package deletion

[jfernandes-envoy]

Try deleting packages via GH API since it isn't supported via cli.

npm ERR! code E405
npm ERR! 405 Method Not Allowed - PUT https://npm.pkg.github.com/@envoy%2fenvoy-integrations-sdk/-rev/undefined - Package deletion from the command line is disabled in GitHub Package Registry. For further details please visit https://help.github.com/en/packages/publishing-and-managing-packages/deleting-a-package.

npm ERR! A complete log of this run can be found in:
Error: Process completed with exit code 1.